#include<bits/stdc++.h>
#define int long long
#define ls(x) ((x)*2)
#define rs(x) ((x)*2+1)
#define Debug(...) fprintf(stderr, __VA_ARGS__)
#define For(i,a,b) for(int i=a,i##end=b;i<=i##end;i++)
#define Rof(i,a,b) for(int i=a,i##end=b;i>=i##end;i--)
#define rep(i,  b) for(int i=1,i##end=b;i<=i##end;i++)
using namespace std;
const int N=1e6+5,base=999983,Mod=998244353;
//char buf[(1<<21)+5],*p1,*p2;
//#define getchar() (p1==p2&&(p2=(p1=buf)+fread(buf,1,1<<21,stdin),p1==p2)?EOF:*p1++)
inline void chmx(int &x,int y){(x<y)&&(x=y);}
inline void chmn(int &x,int y){(x>y)&&(x=y);}
inline void Add(int &x,int y){(x=x+y+Mod)%=Mod;}
inline int read(){
	int f=0,x=0;
	char ch=getchar();
	while(!isdigit(ch)){f|=(ch=='-');ch=getchar();}
	while(isdigit(ch)){x=(x<<3)+(x<<1)+(ch^48);ch=getchar();}
	return f?-x:x;
}
void print(int n){
    if(n<0){
        putchar('-');
        n*=-1;
    }
    if(n>9) print(n/10);
    putchar(n%10+'0');
}
int n; 
struct XXX{
	int a,b;
}z[N];
inline cmp(XXX x,XXX y){
	return x.b<y.b;
}
int hzh[N],qzh[N]; 
signed main(){
	freopen("boast.in","r",stdin);
	freopen("boast.out","w",stdout);
	// ios::sync_with_stdio(false);
	// cin.tie(0); cout.tie(0);
	n=read();
	For(i,1,n) z[i].a=read(),z[i].b=read();
	sort(z+1,z+n+1,cmp);
	hzh[n+1]=1e16;
	Rof(i,n,1){
		hzh[i]=min(hzh[i+1],z[i].a+z[i].b);
	}
	qzh[0]=1e16;
	For(i,1,n) qzh[i]=min(qzh[i-1],z[i].a);
	int ans=1e16;
	For(i,1,n){
		ans=min(ans,z[i].a+z[i].b+qzh[i-1]+hzh[i+1]);
	}
	printf("%lld\n",ans);
#ifdef LOCAL
    Debug("\nMy Time: %.3lfms\n", (double)clock() / CLOCKS_PER_SEC);
#endif
	return 0;
}

